All things being equal, my parents would prefer that the encroachment agreement continues with the new buyers.My question is: is this encroachment agreement only valid with the current owner?

The LLC comprises of multiple partners of equal stake.

Alex this is simply landlording  does not matter how you come about it or where you choose to do it.houses take maintenance  they take effort to keep on top of .. .tenants trash places.. tenants skip on rent etc etc all of this effects the bottom line.. no matter how you bought them where you bought them etc.Just think of those poor investor who flocked to Houston and have no flood insurance.. they are about to get totally wiped out.. never will be able to recover .. as cash flow will never equal there loss's or it will take 30 years.. how was anyone to know that was a poor investment at the time.. 

However, loan officers will approve or deny you for your credit score for a duplex an SFH or a quadplex equally.

I know one can find property tax protest records publicized by the Board of Equalization / local municipality in many states, but I'm not sure if this is true for all 50. 

We ask for a security deposit equal to one month's rent. 

I guess your advice will be the best solution.In that case, just remind her that her options are to: Sell her Condo and add the proceeds to her savings to buy her next primary with all cash; or, just keep saving until it equals the amount needed to buy one, all cash; or, just buy one now for maximum $150k; or, CHANGE her philosophy.

. ** and yes: I don't know how you are arriving at 50k But go see it: based on comparable sales arrive at an ARV (after repair value): then get the estimated rehab cost from a reliable contractor: Then get the ARV $: times 65% : that will give you X: minus repair cost : and that will equal your offer priceFor example: ARV is $100k : times 65% : or 65k minus 20k in renovations: so your offer will be: $45k You can't lose with this formula. 

Which would be equal to about 414k US dollars.

Move in Fees equals First Months Rent and a Security Deposit.